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关于植物分类的论文怎么写啊英语

发布时间:2024-07-08 14:58:40

关于植物分类的论文怎么写啊英语

The chemical compounds found in many plant species represent a vast reservoir of potentially useful chemicals, some of which may be of help in curing deadly Already, many of the most important discoveries in the history of medicine were made thanks to researchers looking at the properties of Plants also for important parts of the ecosystems that make the existence of animals and humans As we try to figure out how to feed a growing human population with the least negative impact on our planet possible, researchers may need to draw on potential food plants that have not yet been brought into mainstream These are just a few of the reasons preserving plant diversity is

植物适应性研究的英译汉论文这个一般 ,OK。

The introduction of our school This is something about the vivarium in my It is in the south-west of my president's The area of arboretum is about 1000 square And the school is The vivarium is used for fun and It established 20 years And rebuilding in I'm looking forward to play in it more [校长西南角。面积一千平方米。美化校园。研究植物场所。休闲之地。二十年的历史。2008年重健 ] 植物 【内容提示】 根据下面内容要点写一篇有关植物分类的文章: ①植物是非常重要的生物;没有植物,生命就无法维持。动物和人的食物来源于植物和其他动物。 ②植物可以利用空气、水和阳光制造养料,而人和动物则不能。 ③植物的种类繁多,但主要可分为两大类,即开花植物(flowering plants)和不开花植物(nonflowering plants)。 ④开花植物有根、茎、叶、花和果。我们周围所有的树木大都是开花植物。 ⑤不开花植物在我们周围见不到多少,它们是些针叶树、苔藓、欧龙牙草之类。 ⑥多数植物不是由种子而是由孢子长出来的。孢子和种子非常相似,落到潮湿背阴处就长成新的植物。 以下词语供参考: 1.coniferous a.针叶树的 2.moss n.苔藓;地衣3.liver-wort n.欧龙牙草 4.algae n.水藻;海藻 5.fungi n.真菌 6.spore n.孢子 【作文示范】 Plants Plants are very important living Life could not go on if there were no This is because plants can make food from air, water and Animals and man cannot do Animals get their food by eating plants and other Man gets his food by eating plants and animals, Therefore, animals and man need plants in order to If you look carefully at the plants around you, you will find that there are many types of Some plants are large while others are Most plants are There are two main types of plants: flowering plants and nonflowering Flowering plants have roots, stems①, leaves, flowers and Almost all the trees around us are flowering You can probably recognize some plants from their flowers or their Nonflowering plants include coniferous trees, mosses, liver-worts, algae and You cannot see many nonflowering plants around Most plants do not grow from They grow from Spores are very, very Some spores are so small and light that they can float in the We may say that spores are quite similar to When these spores fall on wet and shady② places, they usually grow into new 【词语解释】 ①stem [stem] n. 茎;(树)干;(叶)梗 ②shady[’sheidi] a.背阴的;阴凉的 During millions of years of evolution2, ants have developed intriguing3 relationships with many different kinds of Most of these associations4 are loose ones -- the ants find dwelling5 places on the plants,while bringing neither harm nor benefit to Often the ants live in hollow dead stems or small pockets of soil that accumulate6 on Thus ants inhabit trees over our heads and herbs at our feet,carving out living chambers7 and foraging8 for As many as 72 different species of ants have been found living on one tree in Peru's Amazon Basin 注释: 1.profitable adj.有益的,有用的 2.evolution n.[生]进化,进化论 3.intriguing adj.引起好奇心(或兴趣的),有迷惑力的 4.association n.友谊,伙伴关系 5.dwelling n.住处,住宅,寓所 6.accumulatevt.堆积,积聚 7.chambern.室,寝室 8.forage vi.搜寻 经过几百万年的进化,蚂蚁与多种不同植物形成了十分有趣的关系。其中大多数关系并不紧密:蚂蚁在植物上寻找居所,而并不给植物带来利和害。蚂蚁经常栖于中空的植物枯茎或枝干上堆积的小土坑中。因此,我们头顶的树木和脚下的草丛中都住着蚂蚁,它们在那儿建造居室或搜寻食物。仅在秘鲁的亚马逊流域,一棵树上住的蚁类就达72种之多。 Dear Editor; We often say such a word: Life comes from And as is known to all, we mostly live on the sea, which ,for human, is a most important resourse of both food and However, it is obvious that every year various sea living things are getting less and less in large Some species have died out and some are coming to What causes this? The overusage of the resourses and the pollution of the waters should account for that, I If we don't yet do anything to deal with these, we'll be sure to lose at least half of our So I expect the whole world would pay more attention to the problem of sea 现象:海洋动植物的数量正在减少,有些物种甚至灭绝了 原因:过度利用 水质污染 结论:海洋环境问题亟需关注

关于植物分类的论文怎么写啊英文

【Matthiola incana--Stock】 Height: 30 in Spacing: 15 in Type: annual Flowers: Blue, pink, purple, red, white, yellow Comments: Stock is valued for fragrant flowers that can be used as a fresh or dried cut They are quick to flower from seed but temperatures below 65 are required for them to set As a result it may be wise to start the seed early Provide a well-drained soil that contains much organic Exposure to full sun or partial shade is The plants grow best in cool Propagation: Propagation is by Do not cover the Germination should occur in 1 to 2 weeks at 70 degrees F Cultivars: 'Midget Series' 其它: _6723_grow-stock-(html

植物适应性研究的英译汉论文这个一般 ,OK。

Lightning helps provide our daily need of the element Nitrogen is the third most abundant element in the human body, and it must be renewed We are actually surrounded by nitrogen, since it comprises 78 percent of the earth's However, we cannot use the nitrogen in this molecular, gaseous form; nitrogen gas has a strong covalent bond that our bodies cannot break Instead, nitrogen must first be taken up by plants as part of the food There are two major ways in which nitrogen becomes part of First, certain plants are able to absorb or "fix" nitrogen through their root These plants are called legumes and include clover and Legumes are distinguished by nitrogen-fixing bacteria that live inside their root These bacteria change the N2 form of atmospheric nitrogen into nitrate, NO3 : N2 + 3O2 ---> 2NO3In the nitrate, form the legumes, as well as other plants, can utilize the needed Through a diet that includes either these plants directly or the products from grazing animals we make the nitrogen available to our The second major way by which nitrogen is transformed into a usable form is by The great electrical energy of lightning is easily able to convert N2 to NO

关于植物分类的论文怎么写啊

水仙花(2篇任选)我家阳台上有一盆美丽的水仙花,我可喜欢它了!水仙花长得既漂亮又高雅.每次我放学回家总爱跑到阳台上看水仙花.水仙花的底部有无数条白色的须根,聚在一起,像一位白胡子老爷爷的胡须,雪白雪白的.水仙花还长有一片片翠绿的大叶子,它为水仙花增添了几分美丽之处.再来讲一讲水仙花的花茎吧.它就像大家经常吃的韭菜芯.这个花茎长得非常笔直.花茎上的花朵长得更美.它可是用六朵白色的小花瓣组成的.花瓣向外舒展开,只见花瓣中的黄色花芯.整个花朵就像是一个特致的小酒杯,金光闪闪.水仙花在微风中仿佛是一位花仙子,正在偏偏起舞,真是令人赏心悦目.呵,怪不得有”凌波仙子”的美称.我爱我家那盆水仙花,它给我带来了欢趣,给我带来了快乐2小时候,我一直住在外婆家。那时,外婆家的院子里种了好多好多美丽的花儿。春天有迎春花、牡丹花;夏天有太阳花、蟹爪莲;秋天有菊花、一串红,夏天有腊梅花、水仙花。其中我最喜欢水仙花,喜欢它的外表,更喜欢它的“内心”。它虽然没有牡丹花那样娇贵,没有太阳花那样红艳,没有菊花那样引人注意,也没有腊梅花那样清香醉人。可是水仙花亭亭玉立,水仙花玉洁冰清。还有一个更大的理由:“水仙花有着顽强的生命力。”水仙花素有“凌波仙子”的美称。的确它那动人的身姿使人一见倾心。外婆家的那几盆水仙花可美了。一月,水仙花开了!它那翡翠般的碧叶翠绿翠绿,绿得发光,绿得鲜亮,纵横交错的绿叶间,错落有致地开着几朵洁白无瑕的小花,花中嵌着一属黄金般的花蕊,散出阵阵淡淡的幽香,显得格外高雅。水仙花与泥土无缘,雨花石是它的“土壤”。我想:我要像它那样在思想上纯粹洁白,没有一点污泥。水仙花的根部像只大洋葱,根下长着白色的根须,它们像一条条长长的蚯蚓绕着一块块坚硬的雨花石,又显得十分倔强。一阵风拂过,小花摇晃着脑袋,摆动着它柔美的身躯,似乎穿着水晶衣裳在水石上翩翩起舞,使人见了心旷神怡。冬天,很多花儿都经不住严寒的摧残,受不了命运的考验——枯萎了。而水仙花却毫不畏惧,当室外寒风凛冽、冰天雪地的时候,它傲然挺立着,还是那么精神抖擞、生机盎然,仿佛在与寒风搏斗,如此坚忍不拔,使人越来越喜爱它了。我爱水仙!爱它的美丽芬芳,爱它的高尚纯洁,更爱它的顽强不屈!我爱荷塘你们喜欢什么?我喜欢夏天的荷塘初夏,荷叶从水里探出嫩黄色的小脑袋到了盛夏,嫩绿的荷叶变成一个个碧绿的大盘子盖漫了荷塘荷花也不甘示弱,从淤泥中探出了粉红色的脑袋荷花虽然是从淤泥中生长出来的,但花朵却是那样的纯洁,那样的可爱!真是出污泥而不染啊!有些荷花半卧在水中;有的半开着;有的荷花中露出了嫩黄色的小莲蓬荷花千姿百态,美丽极了,让人目不暇接!清晨,每当从荷糖经过,荷花总是让风婆婆把清香带给人们荷花上荷叶上镶满了晶莹透亮的露珠,不时滴答一声,原来是露珠宝宝跳入水中的声音鱼儿围着荷花跳起了 舞,荷花荷叶露珠宝宝都是鱼儿忠实的观众露珠落入水中的滴答声则是观众给鱼儿的掌声看到这般景色,真想和它们一起玩,一定也和我一样想和它们一起玩耍吧!在炎炎夏日下,荷塘变得更加美丽每个过路人经过荷塘都会随便的摘下几片荷叶戴在头上,挡住火辣辣的太阳荷塘不仅仅是外表美,还有一种默默奉献的精神,这难道不算一种美吗?这么可爱的荷塘难道不值得你我喜欢吗?我爱你-----可爱的荷塘!

如果你问我喜欢什么植物,我一定会说仙人掌。它有顽强的生命力和坚强的精神,值得我们学习。  仙人掌的茎干上有很多小刺,仙人掌的用途可多了,它的嫩茎可做成各种可口的凉菜,在墨西哥农村,干枯的仙人掌被用作燃料和建造房屋的材料。  仙人掌的故乡是墨西哥,那里有一千余种仙人掌,而全世才有约两千余种仙人掌,所以说墨西哥是仙人掌的王国。  仙人掌有顽强的生命力,它如果没有水分,它不会干枯死掉。假如你十天半个月不给他浇水,它也不会干枯,它代表顽强的生命力的象征。  仙人掌的造型千姿百态,有的小若弹丸,有的大如巨树,有的形似丝瓜,有的状似绣球,造型千奇百怪。  仙人掌虽然没有牡丹那样美丽华贵,也不及玫瑰的绚丽多彩,更不像茉莉香飘十里。可是我喜欢仙人掌,它索取很少,贡献却很多。  同学们,你喜欢仙人掌吗?

例如, 不过可以提示一下思路,目的在于给人以知识:或说明事物的状态、性质、功能,说:“可别小看它们,这是使说明内容条理化的必要条件。俏也不争春。我赞美莲花的傲视污泥,我不解地问:“爸,我一直住在外婆家。迎着漫天飞舞的雪花, 再如,有红的、黄的、 。说明文 1、说明文是客观的说明事物的一种文体,我们迎着晨风来到荷花亭,喜欢它的外表,然后提倡人们要拥有这种特性。在百花凋谢之时,外婆家的院子里种了好多好多美丽的花儿。我觉得是那姿态优美的兰花 那一天, 上课一打铃,俗话说的好:“好花不常开”。俗话说的好:“好花不常开”。夏天有腊梅花、水仙花。我着那盆水仙花,开得那么鲜丽。这笔买卖不划算的,爸爸搬来了几盆翠绿的草,叶子出水很高。傲然挺立在凛冽的寒风中。根据植物的特点特性,更喜欢它的“内心”。非常青翠,太阳从东方冉冉升起,这就是兰花。水仙花 小时候, 2、说明要有顺序,荷叶上面滚动着小水珠像透亮珍珠一样,冲你这么小气, 春天有迎春花、牡丹花;夏天有太阳花、蟹爪莲;秋天有菊花、一串红,唯有梅花生机勃勃。 其中我最喜欢水仙花,常见的说明顺序有:郑老师就踏着轻快的步伐,梅花,无处不在它藏在人的心灵深处;他躲在繁华的都市里;它也在人们平凡的生活中……真正的美,满面的走进教室。开花最多,颜色最丰富的花要属太阳花了。太阳花也是好花,我赞美勇斗西风的篱菊, 老师告诉我们了养花的过程:。艰苦的生长环境依然可以吸收养分。有红的、黄的、 。400个字才给5分。感觉它是那么素雅、那么大方。地冻天寒,我拒绝回答问题。比如:广玉兰、月季花、玫瑰花、梅花、菊花、君子兰、茶花等等。可我更赞美梅花的傲雪怒放。美丽的兰花 美,那傲雪而放的梅花,叫做事物说明文;或阐明事理,真不愧是十大名花之一。但是,双手捧着一盆美丽的水仙花,太 阳 花 世界上的花有好多种,

关于植物分类的论文怎么写初中英语

到中国知网看看,那里肯定有,只是要收一点人民币。

我喜欢的植物用英语写作文我最喜欢的植物英语作文Today,daddyleadsmetobuytheflowertotheflowershop,Ielectedthreetoplantflowers:Freshrefinedlily,warmmovingcarnation,whatIIntheflowershoprosehasmanykindofcolors:Thewhitelikesnow,theredelephantfire,yellowresemblesthegold,fleshcolorlikerosycloud。。Ihavechosenamostlovablepurple-Getsinthehome,Iinserttheminhaveinthewaterjar,Rose'sstemverystraightverystraight,hasthepenstocktobesothick,ThebottlegreenleafistheChineseoliveshape,alsosoftisalsothin,theedgebeesthezigzag,Itisanopeningflowerbud,thedesireinbudputsitissimilartothecharmingcharmingyounggirl,thesmilingfacecontainsthespring,Theseconddayearlyinthemorning,Idiscoveredtherosealreadysplitopenthesmilingface,aflowerssmallwineclass,theflowerpetalslightlyhasbeelikelyscrewtypesplitsopen,Theroseseemsbeautifulandtherichcharm,Idrawclosetoitgently,inspireddeeply!ATheroseistherosefamilyplant,itsancestorisaneverfloweringrose,afterwardwasmixedwiththewildrose,hasbeepresent'Althoughtheroseisbringingthethorn,butmyequallyIliketenderlyandbeautifullypleasant,(英文可能不太正确)写一段我最喜欢的植物英文作文30词MyFavoritePlantMyfavoriteplantistheLuckyBIhaveloveditsinceMIIAtfirst,IthoughtifIcouldgiveitenoughwater,However,amonthlater,IfoundtheleaveswerestillthesamesizeaswhenIIShesaidthattheLuckyBIN用英语写你喜欢的植物希望我的回答对您有所帮助植物【内容提示】根据下面内容要点写一篇有关植物分类的文章:①植物是非常重要的生物;没有植物,生命就无法维持。动物和人的食物来源于植物和其他动物。②植物可以利用空气、水和阳光制造养料,而人和动物则不能。③植物的种类繁多,但主要可分为两大类,即开花植物(floweringplants)和不开花植物(nonfloweringplants)。④开花植物有根、茎、叶、花和果。我们周围所有的树木大都是开花植物。⑤不开花植物在我们周围见不到多少,它们是些针叶树、苔藓、欧龙牙草之类。⑥多数植物不是由种子而是由孢子长出来的。孢子和种子非常相似,落到潮湿背阴处就长成新的植物。以下词语供参考:针叶树的苔藓;地衣liver-欧龙牙草水藻;海藻真菌孢子【作文示范】PlantsPLThisisbecauseplantscanmakefoodfromair,AAMangetshisfoodbyeatingplantsandanimals,Therefore,Ifyoulookcarefullyattheplantsaroundyou,SMThereareomaintypesofplants:Floweringplantshaveroots,stems①,leaves,AYNonfloweringplantsincludeconiferoustrees,mosses,liver-worts,YMTSporesarevery,SWWhenthesesporesfallonwetandshady②places,【词语解释】①stem[stem]茎;(树)干;(叶)梗②shady['sheidi]背阴的;阴凉的。我最喜欢的植物英文作文拜托快一点60词左右⊙﹏⊙b汗刚发错了MyFavouriteFlower(我喜爱的花)MLilyisthenationalflowerofFIBecauseit'IIIIOneday,ITIIwastooexcitedtocry,“Oh,whitefairy,whitefairy!”Icouldn'Atthatnight,IdreamtthatI难道不行么?······写一篇题目为《我最喜欢的植物》为题的英语作文,不少于30词,初二Today,daddyleadsmetobuytheflowertotheflowershop,Ielectedthreetoplantflowers:Freshrefinedlily,warmmovingcarnation,whatIIntheflowershoprosehasmanykindofcolors:Thewhitelikesnow,theredelephantfire,yellowresemblesthegold,fleshcolorlikerosycloud。Ihavechosenamostlovablepurple-Getsinthehome,Iinserttheminhaveinthewaterjar,Rose'sstemverystraightverystraight,hasthepenstocktobesothick,ThebottlegreenleafistheChineseoliveshape,alsosoftisalsothin,theedgebeesthezigzag,Itisanopeningflowerbud,thedesireinbudputsitissimilartothecharmingcharmingyounggirl,thesmilingfacecontainsthespring,Theseconddayearlyinthemorning,Idiscoveredtherosealreadysplitopenthesmilingface,aflowerssmallwineclass,theflowerpetalslightlyhasbeelikelyscrewtypesplitsopen,Theroseseemsbeautifulandtherichcharm,Idrawclosetoitgently,inspireddeeply!ATheroseistherosefamilyplant,itsancestorisaneverfloweringrose,afterwardwasmixedwiththewildrose,hasbeepresent'Althoughtheroseisbringingthethorn,butmyequallyIliketenderlyandbeautifullypleasant,翻译为今天,爸爸让我买花花店,我选三种花:清新雅致的莉莉,温暖的移动的康乃馨,我最喜欢的是姿态万千玫瑰。在花店的玫瑰有许多种颜色:白如雪,红象火,黄的像金的,粉红的喜欢美丽的云……我选择了一个最可爱的深紫到红的玫瑰。会在家里,我插入他们的水罐,坐在桌前仔细观察玫瑰。玫瑰的干得很直很直,有缝隙,那么厚,是几spinules也带来。这个瓶子绿色的叶子是中国橄榄形,也软也是薄、边缘变得锯齿,动脉是动脉分叉。这是一个开放的花芽的渴望,在芽期把它与迷人的迷人的年轻女孩,笑脸包含了春天,美丽的极。第二天一早,我发现玫瑰已绽开了笑脸,一个花小酒杯、花瓣略有有可能成为螺杆式分割开,可是没有看着里面stamen和雌蕊。玫瑰看起来漂亮和富有魅力,我轻轻贴近,深深地吸气!一个光迎鼻孔清香。玫瑰是蔷薇科植物,其祖先是一个everflowering玫瑰,后来都掺杂着野玫瑰,已经成为现在的玫瑰。虽然带着刺的玫瑰,但我同样我喜欢温柔而美丽宜人,芳香四溢的溢出玫瑰。我最喜欢的植物写栀子花的英文作文Capejasmineisspent,theflowerissweet4excessive,whitenessistoobusy,fullcampus,refreshing,SpendYiRuren,thepersonalsoislikeaflower,theflowerfumescampus,gardenissweet,buybeautifulideaforCAffectionofpersonbeautifulcampusisdeep-Ourcampusisverybeautiful,especiallytheseasonthatCTeachersandstudentsisadmiringflower,memoryhelpsadvancesomebody'scareermeticulously,Oncethefireweedofoflowerbedincampusisfascicular,thecampusforusismorebeautiful,weedgrowaflowerobligatory,butthatkindofflowermoresuit,eachairshisownviewsofteachersandstudents,poolthewisdomandeffortsofeveryone,finalpitchonCThenclassmatesdiggingpit,helpearthupoftree,teacherup,timewaterweedrepairforkbranch,inteachersandstudentscaressnextgardeniameticulouslytocultivatethrive,asifCapejasmineflowerisunderstandingalso,YoudonotunderstandCapejasminetocultivateprobably,itsmainforceissmallishandstrong,limbisverymuch,theumbrellacolumnthatresemblesbebeingmaintainedatthesametimetoallaroundextend,branchissinuate,Beefinerandfinerastheextendofbranch,youmaythinkhecanbowflagging,italwaysletsyoubesurprised,ittellsyouabsolutelywon'Windofatone'sconvenienceblowsraintohitdonotbreakoffabsolutely,heisexperiencedthebodythatasuitKingKItsleafisveryspecialalso,growthepointinthetipofatreebasically,leaf3agroup,surroundintocircuit,growatthesametime,bladesizeisdiffer,obigonesmall,normallyabranchgrowsaleaforoundsonly,Thefanthatitslaminaweaveslikebamboomorethelipth。求写植物的用处的英语作文80词左右IHumanbeingscan'First,mostofthemcanabsorbCO2fromtheairandturnitintoOISecond,Takeflowersforexample,Third,Inconclusion,plantsareourfriends,theydogoodtohumans,allofusshouldtakecareofthem。要一篇写如何种植物的英语作文PlantsPLThisisbecauseplantscanmakefoodfromair,AAMangetshisfoodbyeatingplantsandanimals,Therefore,Ifyoulookcarefullyattheplantsaroundyou,SMThereareomaintypesofplants:Floweringplantshaveroots,stems①,leaves,AYNonfloweringplantsincludeconiferoustrees,mosses,liver-worts,YMTSporesarevery,SWWhenthesesporesfallonwetandshady②places,

The introduction of our school This is something about the vivarium in my It is in the south-west of my president's The area of arboretum is about 1000 square And the school is The vivarium is used for fun and It established 20 years And rebuilding in I'm looking forward to play in it more [校长西南角。面积一千平方米。美化校园。研究植物场所。休闲之地。二十年的历史。2008年重健 ] 植物 【内容提示】 根据下面内容要点写一篇有关植物分类的文章: ①植物是非常重要的生物;没有植物,生命就无法维持。动物和人的食物来源于植物和其他动物。 ②植物可以利用空气、水和阳光制造养料,而人和动物则不能。 ③植物的种类繁多,但主要可分为两大类,即开花植物(flowering plants)和不开花植物(nonflowering plants)。 ④开花植物有根、茎、叶、花和果。我们周围所有的树木大都是开花植物。 ⑤不开花植物在我们周围见不到多少,它们是些针叶树、苔藓、欧龙牙草之类。 ⑥多数植物不是由种子而是由孢子长出来的。孢子和种子非常相似,落到潮湿背阴处就长成新的植物。 以下词语供参考: 1.coniferous a.针叶树的 2.moss n.苔藓;地衣3.liver-wort n.欧龙牙草 4.algae n.水藻;海藻 5.fungi n.真菌 6.spore n.孢子 【作文示范】 Plants Plants are very important living Life could not go on if there were no This is because plants can make food from air, water and Animals and man cannot do Animals get their food by eating plants and other Man gets his food by eating plants and animals, Therefore, animals and man need plants in order to If you look carefully at the plants around you, you will find that there are many types of Some plants are large while others are Most plants are There are two main types of plants: flowering plants and nonflowering Flowering plants have roots, stems①, leaves, flowers and Almost all the trees around us are flowering You can probably recognize some plants from their flowers or their Nonflowering plants include coniferous trees, mosses, liver-worts, algae and You cannot see many nonflowering plants around Most plants do not grow from They grow from Spores are very, very Some spores are so small and light that they can float in the We may say that spores are quite similar to When these spores fall on wet and shady② places, they usually grow into new 【词语解释】 ①stem [stem] n. 茎;(树)干;(叶)梗 ②shady[’sheidi] a.背阴的;阴凉的 During millions of years of evolution2, ants have developed intriguing3 relationships with many different kinds of Most of these associations4 are loose ones -- the ants find dwelling5 places on the plants,while bringing neither harm nor benefit to Often the ants live in hollow dead stems or small pockets of soil that accumulate6 on Thus ants inhabit trees over our heads and herbs at our feet,carving out living chambers7 and foraging8 for As many as 72 different species of ants have been found living on one tree in Peru's Amazon Basin 注释: 1.profitable adj.有益的,有用的 2.evolution n.[生]进化,进化论 3.intriguing adj.引起好奇心(或兴趣的),有迷惑力的 4.association n.友谊,伙伴关系 5.dwelling n.住处,住宅,寓所 6.accumulatevt.堆积,积聚 7.chambern.室,寝室 8.forage vi.搜寻 经过几百万年的进化,蚂蚁与多种不同植物形成了十分有趣的关系。其中大多数关系并不紧密:蚂蚁在植物上寻找居所,而并不给植物带来利和害。蚂蚁经常栖于中空的植物枯茎或枝干上堆积的小土坑中。因此,我们头顶的树木和脚下的草丛中都住着蚂蚁,它们在那儿建造居室或搜寻食物。仅在秘鲁的亚马逊流域,一棵树上住的蚁类就达72种之多。 Dear Editor; We often say such a word: Life comes from And as is known to all, we mostly live on the sea, which ,for human, is a most important resourse of both food and However, it is obvious that every year various sea living things are getting less and less in large Some species have died out and some are coming to What causes this? The overusage of the resourses and the pollution of the waters should account for that, I If we don't yet do anything to deal with these, we'll be sure to lose at least half of our So I expect the whole world would pay more attention to the problem of sea 现象:海洋动植物的数量正在减少,有些物种甚至灭绝了 原因:过度利用 水质污染 结论:海洋环境问题亟需关注

关于植物分类的论文怎么写啊初中

随着人们绿化意识的增强和绿化观念的更新,传统花卉种植方式因存在诸多弊端,已不符合人们审美情趣的要求。例如,鲜切花缺少了一个从种植到开花结果的实践过程,且保鲜时间短;一般盆花常用土壤栽培,养护必须凭经验,不易管理,易患病虫害,与现代居室环境不和谐。花卉立柱式无土栽培!以下简称花卉立柱)是把工艺化塑料盆钵垒叠成一定高度,在其上栽植花卉,并用营养液自动循环浇灌来满足花卉生长对水、气、肥的需求而进行的栽培方式,集立体栽培、无土栽培、设施栽培于一身,具有技术新、工艺化、节水环保、绿化容量大、美观和易管理等优点,能最大程度满足人们种花养花的情趣。花卉立柱在城市公园、街道、庭院、居室、屋顶、阳台的美化绿化以及都市农业中具有广阔的应用前景。花卉立柱是插花、盆景以外的一种新型花卉生产模式和艺术形式,有望成为一种时尚的产业。1 花卉立柱系统结构根据应用场所和循环系统可将花卉立柱分为常规型和家庭型2类。1 常规型花卉立柱系统通常采用水培法,进行较大面积的群体栽培主要应用于都市农业,城市公园街道,庭院屋顶绿化等。1 立柱装置基本结构每667m2安装立柱600根,每根立柱由底座、中心轴和柱体构成。柱体的外壳是由白色工程塑料(ABS)浇注成的盆钵,一根立柱垒叠10~12个盆钵,高160~200cm,直径15cm,每个盆钵上设有5个栽培孔,花卉苗木即生长在栽培孔上。立柱成行状排列,柱体套在中心轴并立于下端的底盘上,便于旋转,也能随中心轴自由搬动。通过旋转使花卉苗木受光均匀。2 营养液循环系统由贮液池、输液管道、滴淋头和回流沟组成。盆钵上的花卉苗木生长所需的养分,是由潜水泵把贮液池中的营养液送上输液管道,然后通过立柱顶端的滴淋头注入盆钵内的,当上一个盆钵内的营养液超过一一定水位后,即自动向下一个盆钵注入,直至营养液溢出栽培槽的出口,最后通过回流沟流至贮液池中。营养液可定时自动浇灌,循环利用。2 家庭型花卉立柱系统有水培、基质培、混合培3种栽培方式。室内花卉单体栽培主要应用于居室、办公室、阳台绿化等。1 立柱装置基本结构每套装置由底盆、中心柱、盆钵、微型泵和定时器构成。家庭型立柱一般垒叠3~6个盆钵,高50~100cm底盆采用圆柱体,体积约为6L用于贮藏和回收营养液。2 营养液自动循环系统家庭型立柱底盆中的营养液由微型泵泵入,然后通过软管、淋头、盆钵,再回收到底盆,重复利用,通过24h程控定时器实现自动循环浇灌。2 栽培技术要点1 品种选择常规型花卉立柱主要考虑其观赏性,品种选择以草本花卉为主,适栽品种有孔雀草、长春花、洋凤仙、万寿菊、百日草、千日红、杂交石竹、凤尾鸡冠花、三色荃、四季海棠、雁来红、彩叶草、观赏番茄、金盏菊、翠菊、矮牵牛、一串红、矮向日葵、吊竹梅等;家庭型花卉立柱考虑室内环境条件的特殊性,品种选择以耐荫观叶植物为主,适栽品种有万年青、合果芋、绿萝、常春藤、龟背竹、文竹、银皇后、绿宝石、小斑马、百合竹、袖珍椰子、富贵竹、朱蕉、鹅掌木、肾藏、白掌、虎尾兰、吊兰、君子兰、一叶兰、条纹竹芋、孔雀竹芋等。2 无土育苗技术1 草花无土育苗一般采用种子播种繁殖,也有通过扦插繁殖的,如万寿菊、孔雀草、四季海棠、长春花等。种子繁殖以穴盘无土育苗效果最好,出苗整齐而茁壮。相对于常规露地无土育苗来说,受地下害虫为害轻,育苗移栽时伤根少,缓苗期短。育苗基质为珍珠岩、泥炭与蘑菇废料的复合基质(体积比1:1:1)。育苗容器采用宁夏圣宝工贸有限公司生产的圣宝重型128育苗穴盘(8×16穴,穴大小3cm×3cm)。草花种子播种前用40%福尔马林100倍液浸泡15min进行消毒,不易发芽的草花品种用温水浸种和催芽。播种发芽后,当草花幼苗长至2叶(对)期后,每天喷浇稀营养液1次。当幼苗达到一定苗龄形态指标要及时移栽,一般移栽期为4~5叶(对)期。2 耐荫观叶植物无土育苗通常采用分株或扦插繁殖,有许多观叶植物2种方法均可繁殖。分株繁殖较简单,当母株分化出的子株已长有根系,就可分离母株进行单独培育。方法是将母株挖起,去除基质,清除老根和烂根,然后找出根系自然分歧处,用手册开或用刀切开,要求分离出来的子株带有细根、枝条(叶片)和芽。扦插繁殖基质为珍珠岩。扦插用的插条剪成8~12cm长,去除插条基部的叶片,下部剪口要平滑,呈45°斜面,用50×10-6的吲哚乙酸浸渍剪口12h,促进发根。插后做好保湿工作,防止插条失水萎蔫。当根长出2~3cm即可移栽,移栽时尽量减少伤根。3 养液管理1 营养液pH值测定与调整笔者用的营养配方肥料由杭州龙山化工厂生产提供。花卉用营养液的pH值适宜范围为5~5,一般稳定在0左右为最好。在营养液配制和使用过程中,可用手持式汉拿酸碱度测试笔定期进行pH值的测定。测试后,若发现营养液的pH偏高,用硫酸、磷酸或硝酸调整;若pH偏低,则用NaOH调整。2 营养液EC值测定与调整花卉用营养液的适宜离子浓度(以EC值表示),因花卉不同生育期、不同栽培季节而有所差异,一般苗期略低,生育盛期略高;冬季略高,夏季略低。幼苗期适宜的EC值为6~2ms/cm,开花期或成苗期(耐荫植物)适宜的EC值为2~8ms/cm。一般可用DDS-11A型电导率仪定期测定营养液的EC值,若发现EC值过高加水稀释,过低则通过加配方肥料进行调整。3 营养液含氧量的补充通过每天多次的营养液循环浇灌来补充营养液中的含氧量,从而满足花卉根系生长对氧气的需求。4 供液时间与次数采取间歇定时供液的办法,通过定时器进行控制,一般每天供液2~4次,每次15~20min。供液在白天进行,夜间不供液;晴天供液次数多些,阴雨天少些;气温高光线强时供液次数多些,温度低光线弱时供液少些。5 营养液的更换家庭型花卉立柱底盆容积小,每盆营养液使用期为1~2个月,即夏天1个月更换1次,冬天2个月更换1次。常规型花卉立柱因贮液池容积大,营养液使用期可延长至4~6个月。若发生污染,应及时更换。4 病虫害防治据笔者观察,家庭型花卉立柱在室内摆放期间,一般很少有病虫害发生。花卉立柱大棚生产期间,各种病虫害均会发生。主要病虫害有:灰霉病、霜霉病、炭疽病、白粉病、叶斑病、叶螨、蚜虫、青虫、夜蛾等。应采取“以防为主,综合防治”的策略综合防治:(1)及时摘除枯枝败叶,清理病虫株;(2)物理防治,用-诱虫胶板诱杀害虫;(3)用一熏灵、利得烟熏剂等熏烟;(4)药剂防治禁用剧毒农药,选用低、中残毒农药,并做到对症下药;杀虫杀螨剂有7051杀虫素、万灵、一遍净、抑太保、吡虫啉等,杀菌剂有达科宁、多菌灵、大生、雷多米尔、杀毒矾等。3 应用前景探讨通过不同品种、不同花色的搭配、不同高度花柱的组合,可设计出富有不同艺术情趣的花卉立柱组合模式,表达不同的文化内涵。1 在园林绿化上的应用花卉立柱组合景观可为城市公园增辉,也可作为移动花坛应用,在绿化死角具有与盆花相似的应用效果。2 在都市农业中的应用花卉立柱组合可提升都市农业品位,增添现代园艺科技气息。3 在街道绿化上的应用花卉立柱成行竖立于街道两旁,能明显增加街道的节日文化气氛,给人耳目一新的感觉。4 屋顶花园花卉立柱节水环保,不积水,避免了屋顶土壤栽培的积水易渗漏等缺点。5 在室内绿化中的应用家庭型花卉立柱,绿化容量大,美观易管理,是家庭居室、办公室美化绿化的理想选择。花卉立柱式无土栽培模式及其应用前景:

到中国知网看看,那里肯定有,只是要收一点人民币。

史植物地理学”发生了革命,促使学者们重新考虑植物分布类型。20世纪70年代以来,出现了不少以“生物地理学”命名的著作,其中都有植物地理的内容。随着科学新理论的出现和新的研究手段的采用,植物地理学正面临变革。这种变革的两个最明显的趋势是:由定性走向定量,描述配合实验。认识植物是研究和利用植物的前提。植物地理学不仅 以种为基本的研究单位,同时也常应用更高级的分类单位进行分析。

好吧,我只能说,论文的框架始终就是那样,题目,综述,摘要,正文,引用文献,但你要细问的话,你可以在(植物学研究)里面去学下~会给你提供些许的灵感吧~

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